Lock.



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A. N. WICKHAM.

LOCK.

` APPLICATION FILED AUG.18.1906.

PATENTED JULY 30, 1907.

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PATENTED JULY 30, 190'7.

A. N. WIGKHAM.

LOCK.

' APPLICATION FILED AUG.1a.19o.

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ARTHUR N. WICKHAM, OF LINCOLN, NEBRASKA.

LOCK.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed August 18,1906. Serial N 331,163.

To all whom 'it may concern:

Be it known that I, ARTHUR N. WICKHAM, a citizen of the United States, and a resident of Lincoln, in the county of Lancaster and State of Nebraska, have Vinvented a new and Improved Lock, of which the following is a full, clear, and exact description.

My invention has for its object to provide a lock which is simple in construction, effective in operation. and durable in use, the advantages oi which are hereinafter more particularly stated. These ends I attain by the means illustrated in the accompanying drawings, in which drawings like characters of reference indicate like parts throughout the views, -and in which Figure 1is a side elevation of a lock embodying my invention with the side plate removed, the bolt being shown drawn into the casing; Fig. 2 represents the parts shown in Fig. 1 with the bolt projecting from the casing; Fig. 3 is a transverse section taken on the line 3 3 of Fig. 1; Fig. 4 is a transverse section taken on the line 4 4 of Fig. 1; Fig. 5 is a perspective view of alatch tumbler; Fig. 6 is a perspective view of a locking tum-y bler; Fig. 7 is a side elevation of the end of a latch tumbler locked in engagement with an inner casing shown in section; and Fig. 8 is a transverse section taken on the line 8 8 of Fig. 1.

As illustrated in the drawings 1 represents a casing of ordinary construction having-side anges 1, an end flange 11 and a face plate' 1c. A combined latch and bolt 2 is arranged within the casing so as to move longitudinally thereof, its forward end 2 being adapted to move in a corresponding slot 1b formed in the face plate 1c of th casing. The latch-bolt 2 is provided with a rearwardly extending arm 3 having recesses 3 formed therein and separated by a block 4. A spring 5 is secured at one end to the casing, and its opposite free end bears against the end of the arm 3 of the latch-bolt so as to force the forward end 2 of said latch-bolt outward from the front of the casing, as shown in Fig. 2. A hub 6 is mounted upon a handle bar 7 extending through the casing and is provided with arms 8 which engage respectively the recesses 3 formed in the arm 3 of the latch-bolt. These arms are adapted to bear against the edges of the block 4 and move the arm 3 and the latchbolt 2 connected therewith backward and forward so as to extend the end 2 of the latch-bolt beyond the face of the casing, or withdraw said end into the casing. Similar latch tumblers 9 are provided on their forward ends with arms 10 having curved ends 10 adapted thereby to engage a corresponding recess 2b ormed in the side of the latch-bolt 2. A locking tumbler 11 is provided on its rear end with a recess 11, and on its forward end with an arm 12 curved similar to the curved arms 10 of the latch tumblers 9, and is arranged alongside of the tumblers 9, as shown in Fig. 8, with the curved end 12 of the arm 12 iulcrumed in the recess 2 of ,the latch-bolt 2. The latch tumblers 9 are provided with an elongated angular recess 9 and a shorter recess 9b, separated from the recess 9 by a shoulder 9, so that when two similar latch tumblers are placed side by side with the slots of each tumbler adjacent to each other, an elongated symmetrical joint recess 9 is produced in the central portion of the tumblers, with a corresponding shorter recess 9b in the ends of such tumblers.

An inner casing 13 is formed on the side of the main casing 1 and extends preferably to the detachable side 1g of the main casing. An end wall of the casing 13 is provided with a lip 13 which engages the recesses 9 formed in the tumblers 9, as shown in Fig. 8. The interior of said casing opens into said recesses, as indicated in Fig. 4. A keyhole 1 is formed in the main casing opening into the interior of the inner casing 13, whereby a key inserted in the keyhole 1i of the casing is adapted to enter the recess 9 of the tumblers 9 and depress the end of said tumblers into the position indicated by dotted lines in Fig. 2. In their normal position, however, the tumblers 9 are pressed upward by means of a spring 15 shown in Fig. 8, so as to bring the lip 13L in engagement with either the recesses 9 or 9L', and in line with the shoulder 9, and prevent longitudinal movement of the tumblers 9 and the latch-bolt 2 connected therewith. The locking tumbler 11 is held normally against the lower portion of the inner casing 13 by means of a spring 16, as shown in Fig. 4, and such portion of the casing is adapted to engage the recess 11 formed in the end of the tumbler and thereby lock the latch-bolt 2 in the desired position. The lower portion of the inner casing 13 which bears against the side of the tumbler 11 is closed so that it cannot be reached by a key or other device inserted through the keyhole. A short pin 17 is mounted on one ofthe sides of the inner casing, and is provided on its outer end with a head 18 by means of which the pin 17 may be rotated on the inner casing, and the inner end of said pin is provided with an arm 19 adapted to bear against the upper edge of the locking tumbler 11 so as to compress the spring 16 and release the recess 11 from engagement with the end of the inner casing 13. A lever 21 is pivoted to the side of the inner casing 13 by means of a pivot 21, and the opposite end of said lever is pivoted to an arm 20 by means of a pin 20 as shown in Fig. 3. The arm 20 is adapted to bear against the upper edge ofthe tumblers 9 so as to depress the spring 15 and release said tumblers from engagement with the lip 13fL of the inner casing 13. The tumbler 11 is intended to be used as a night bolt, or when it is desired to lock the door from the inside so that it cannot be opened by a key from the outside, and for suchreason the bolt is covered by the under portion ofthe auxiliary casing 13 as before mentioned. When it is not desired to use such bolt the arm 19 may be turned' against the upper edge of the tumbler and set in such position so as to compress the spring 16 and release the tumbler from engagement with the under portion oi the casing 13. The latch-bolt 2 may be operated as a latch from the insideloi the room by pressing the end of the lever 21 so that the arm 20 bearing against the upper edges of the tumblers 9 will depress the ends of said tumblers against the spring 15 and release the upper edges of such tumblers from engagement with the lip 13a oi the inner casing 13. The latch-bolt 2 may then be turned by operating the handle bar 7 having the usual handle attached thereto. The tumblers 9 may also be depressed from the outside by means of a key inserted through the keyhole, and'adapted to bear against the upper edges of said tumblers which are exposedto the interior oi the inner casing 13. When the latch-bolt 2 is operated as a latch, the lip 13ad of the auxiliary casing 13 is in engagement with the recesses 9a oi the tumblers 9, such recesses being elongated for the purpose of providing a longitudinal movement of the tumblers while the lip 13a of the auxiliary casing is in engagement therewith. When the latch-bolt 2 is used as a bolt rather than as a latch, it is moved forward to its fullv extent so that the lip 13L of the inner casing 13 Will engage the recesses 9b of the tumblers 9. Such recesses being of substantially the same dimension as the portion of the inner casing engaging therewith, when said recess is in engagement with said portion of the inner casing and held in position by the spring 16, the latch-bolt 2 cannot be moved backward to any extent, and remains in that position until released fromengagement with the inner casing by means oi the tumbler 9 attached to the pin 17.

The lock when in use may be placedv in a door with the portion of the casing bearing` the latch-bolt arm 3 arranged upper most, as shown in Figs. 1 and' 2. The

lock may, however, be inverted and placed in the door with that portion of the casing bearing the latch tumblers 9 and locking tumbler 11 arranged uppermost. When so arranged the tumblers 9= and l1 drag over the inner casing and fall into locking engagement with said casing of their own Weight, and operate even if the springs 15 and 16 become inoperative. An inclined step 1c is formed in the side flange 1SL oi the casing adjacent to said tumblers, which aids in holding the edges of said tumblers against the inner casing 13, as the end of the latch bolt 2 is extended through the face plate 1e of'the main casing.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent:

1. The combination with a "casing, of a latchbolt, latch tumbler-s pivotally secured thereto and provided with a joint recess, an inner casing having an opening in the wall adjacent to the recesses of said tuinblers, and a projection formed on the inner casing' adapted to engage said recesses. l

2. 'lhe com bination with a casing, of a latch bolt having a longitudinally extending arm, a handle bar provided with levers adapted to.operate said arm, latch tumblers pivotally mounted on said latch bolt and provided with joint recesses, an inner casing adapted to engage said rel cesses and having its interior communicating therewith, a key hole formed in said inner casing, and mechanism adapted to release said tumblers from engagement with said inner casing. ,A

3. The combination with a casing, of a latch bolt, latch tumblers pivotally secured thereto and provided with a joint recess, a locking tumbler pivotally secured to said latch bolt and provided with a recess, an inner casing having an open wall opposite the adjacent edges of the latch tumblers, and a closed wall opposite to the adjacent edge of the locking tumbler, and a projection formed on. the inner casing adapted to engage the recesses of the latch and lock tumblers.

4. The combination with a casing, of a latch bolt, latchr tumblers pivotally secured thereto, provided with joint recesses and an intermediate joint lug, an inner casing having an opening in the wall opposite to the-recessed edge of said tumblers, and a projection formed on-the inner casing adapted to engage said recesses and bear against said lug of the latch tumblers.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

, ARTHUR N. WICKI'IAM. Witnesses GLENN STEWART, M. E. COLEMAN. 

